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A" 11-Th <br /> p ' om <br /> ��L <br /> FUGRO WEST, INC. <br /> 1050 Melody lane,Suite 160 <br /> December 14, 1995 Roseville,California 95678 <br /> Project Number: 9547-0571 FAX: (916)786-7830 <br /> Mr. Steven Sasson <br /> San Joaquin County Public Health Services <br /> Environmental Health Division <br /> Post Office Box 388 <br /> Stockton, California 95201-0388 <br /> Subject: Site Investigation Workplan Addendum <br /> Shell Service Station (WIC No. 204-4416-0806) <br /> 880 Victor Road, Lodi, California <br /> San Joaquin County Site Code: 1746 <br /> Dear Mr. Sasson: <br /> Fugro West, Inc. (Fugro), on behalf of Shell Oil Products Company (Shell), is providing <br /> this letter supplementing the workplan dated September 13, 1995, for the subject site (Figures 1 <br /> and 2). The purpose of this letter is to address the recommendations outlined by San Joaquin <br /> County Public Health Services/Environmental Health Division (SJCPHS/EHD), in a letter to Shell <br /> dated November 14, 1995. <br /> Our modifications to the workplan, as requested in the November 14, 1995, SJCPHS/EHD <br /> letter, are as follows: <br /> 1) A GeoProbe soil boring will not be advanced in the area of sample ES-2SSW/17 <br /> south of the underground storage tank (UST) basin. <br /> 2) To address the area beneath sample TPI/21, Fugro will advance an angle boring <br /> southeast of the UST basin (Figure 2). <br /> 3) To assure the GeoProbe borings define the vertical extent of contamination, Fugro <br /> will terminate the vertical borings when field screening indicates soils free of <br /> contamination have been encountered. <br /> 4) The shallowest samples which appear to be free of contamination based on field <br /> screening will be submitted for chemical analysis. <br /> 5) If field observations indicate the lateral extent of contamination is not defined with <br /> the initial soil borings, Fugro will advance a maximum of three additional soil <br /> borings. The locations of the additional borings will be determined in the field. <br /> 95470571.BWP <br /> A member of the Fugro group of companies with offices throughout the world <br />